*     values.
   */
  @Deprecated
  // com.google.common.math.DoubleUtils
  @GwtIncompatible
  public static double mean(Iterable<? extends Number> values) {
    return mean(values.iterator());
  }

  /**
   * Returns the <a href="http://en.wikipedia.org/wiki/Arithmetic_mean">arithmetic mean</a> of
   * {@code values}.
   *

   *
   * @param elements the elements that the multiset should contain
   */
  public static <E> ConcurrentHashMultiset<E> create(Iterable<? extends E> elements) {
    ConcurrentHashMultiset<E> multiset = create();
    Iterables.addAll(multiset, elements);
    return multiset;
  }

  /**

   *
   * @param elements the elements that the multiset should contain
   */
  public static <E> ConcurrentHashMultiset<E> create(Iterable<? extends E> elements) {
    ConcurrentHashMultiset<E> multiset = create();
    Iterables.addAll(multiset, elements);
    return multiset;
  }

  /**

    assertThat(scanResourceNames(ClassLoader.getSystemClassLoader()))
        .contains("com/google/common/reflect/ClassPathTest.class");
  }

  private static ClassPath.ClassInfo findClass(
      Iterable<ClassPath.ClassInfo> classes, Class<?> cls) {
    for (ClassPath.ClassInfo classInfo : classes) {
      if (classInfo.getName().equals(cls.getName())) {
        return classInfo;
      }
    }

    assertThat(MANY_VALUES_STATS_VARARGS.populationVariance())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_SUM_OF_SQUARES_OF_DELTAS / MANY_VALUES_COUNT);
    // For datasets of many double values created from an iterable, we test many combinations of
    // finite and non-finite values:
    for (ManyValues values : ALL_MANY_VALUES) {
      double populationVariance = Stats.of(values.asIterable()).populationVariance();

            .createTestSuite());
    suite.addTest(
        SetMultimapTestSuiteBuilder.using(new ImmutableSetMultimapCopyOfEntriesGenerator())
            .named("ImmutableSetMultimap.copyOf[Iterable<Entry>]")
            .withFeatures(ALLOWS_ANY_NULL_QUERIES, KNOWN_ORDER, SERIALIZABLE, CollectionSize.ANY)
            .createTestSuite());
    return suite;
  }

                CollectionFeature.KNOWN_ORDER,
                MapFeature.REJECTS_DUPLICATES_AT_CREATION,
                MapFeature.ALLOWS_ANY_NULL_QUERIES)
            .named("ImmutableSortedMap.copyOf[Iterable<Entry>]")
            .createTestSuite());

    suite.addTest(
        ListTestSuiteBuilder.using(new ImmutableSortedMapEntryListGenerator())
            .named("ImmutableSortedMap.entrySet.asList")

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[16:19] hl[17] *}

#### 隨機項目 { #a-random-item }

透過 `data.items()` 我們會得到一個包含每個字典項目鍵值對 tuple 的 <dfn title="可以用 for 迴圈遍歷的東西，例如 list、set 等等。">iterable object</dfn>。

我們用 `list(data.items())` 把這個可疊代物件轉成正式的 `list`。

接著用 `random.choice()` 從清單中取得一個「隨機值」，也就是一個 `(id, name)` 的 tuple。可能像是 `("imdb-tt0371724", "The Hitchhiker's Guide to the Galaxy")`。

   *
   * @throws IllegalArgumentException if either {@code attribute} or {@code values} is invalid
   * @since 24.0
   */
  public MediaType withParameters(String attribute, Iterable<String> values) {
    checkNotNull(attribute);
    checkNotNull(values);
    String normalizedAttribute = normalizeToken(attribute);
    ImmutableListMultimap.Builder<String, String> updatedParameters =

    assertFalse(ArbitraryInstances.get(PeekingIterator.class).hasNext());
    assertFalse(ArbitraryInstances.get(ListIterator.class).hasNext());
    assertEquals(ImmutableSet.of(), ArbitraryInstances.get(Iterable.class));
    assertEquals(ImmutableSet.of(), ArbitraryInstances.get(Set.class));
    assertEquals(ImmutableSet.of(), ArbitraryInstances.get(ImmutableSet.class));